diff --git a/js/src/positionset.js b/js/src/positionset.js
new file mode 100644
index 0000000..736bad7
--- /dev/null
+++ b/js/src/positionset.js
@@ -0,0 +1,101 @@
+/*
+ * μlogger
+ *
+ * Copyright(C) 2019 Bartek Fabiszewski (www.fabiszewski.net)
+ *
+ * This is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+import uAjax from './ajax.js';
+import uListItem from './listitem.js';
+import uPosition from './position.js';
+
+/**
+ * Set of unrelated positions
+ * @class uPositionSet
+ * @property {uPosition[]} positions
+ */
+export default class uPositionSet extends uListItem {
+
+  constructor() {
+    super();
+    this.positions = [];
+  }
+
+  clear() {
+    this.positions.length = 0;
+  }
+
+  /**
+   * @return {number}
+   */
+  get length() {
+    return this.positions.length;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  get hasPositions() {
+    return this.positions.length > 0;
+  }
+
+  // eslint-disable-next-line no-unused-vars,class-methods-use-this
+  isLastPosition(id) {
+    return true;
+  }
+
+  // eslint-disable-next-line no-unused-vars,class-methods-use-this
+  isFirstPosition(id) {
+    return true;
+  }
+
+  /**
+   * Get track data from json
+   * @param {Object[]} posArr Positions data
+   * @param {boolean=} isUpdate If true append to old data
+   */
+  fromJson(posArr, isUpdate = false) {
+    let positions = [];
+    if (isUpdate) {
+      positions = this.positions;
+    } else {
+      this.clear();
+    }
+    for (const pos of posArr) {
+      positions.push(uPosition.fromJson(pos));
+    }
+    // update at the end to avoid observers update invidual points
+    this.positions = positions;
+  }
+
+  /**
+   * Fetch latest position of each user.
+   * @return {Promise<uPositionSet, Error>}
+   */
+  static fetchLatest() {
+    return this.fetch({ last: true }).then((_positions) => {
+      if (_positions.length) {
+        const set = new uPositionSet();
+        set.fromJson(_positions);
+        return set;
+      }
+      return null;
+    });
+  }
+
+  static fetch(params) {
+    return uAjax.get('utils/getpositions.php', params);
+  }
+}
diff --git a/js/test/positionset.test.js b/js/test/positionset.test.js
new file mode 100644
index 0000000..d8a8c8b
--- /dev/null
+++ b/js/test/positionset.test.js
@@ -0,0 +1,223 @@
+/*
+ * μlogger
+ *
+ * Copyright(C) 2019 Bartek Fabiszewski (www.fabiszewski.net)
+ *
+ * This is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+import uPosition from '../src/position.js';
+import uPositionSet from '../src/positionset.js';
+
+describe('PositionSet tests', () => {
+
+  let set;
+
+  let posId;
+  let latitude;
+  let longitude;
+  let altitude;
+  let speed;
+  let bearing;
+  let timestamp;
+  let accuracy;
+  let provider;
+  let comment;
+  let image;
+  let username;
+  let trackid;
+  let trackname;
+  let meters;
+  let seconds;
+
+  let jsonPosition;
+
+  beforeEach(() => {
+
+    set = new uPositionSet();
+
+    posId = 110286;
+    latitude = 11.221871666666999;
+    longitude = 22.018848333333001;
+    altitude = -39;
+    speed = 0;
+    bearing = null;
+    timestamp = 1564250017;
+    accuracy = 9;
+    provider = 'gps';
+    comment = null;
+    image = '134_5d3c8fa92ebac.jpg';
+    username = 'test';
+    trackid = 134;
+    trackname = 'Test name';
+    meters = 0;
+    seconds = 0;
+
+    jsonPosition = {
+      'id': posId,
+      'latitude': latitude,
+      'longitude': longitude,
+      'altitude': altitude,
+      'speed': speed,
+      'bearing': bearing,
+      'timestamp': timestamp,
+      'accuracy': accuracy,
+      'provider': provider,
+      'comment': comment,
+      'image': image,
+      'username': username,
+      'trackid': trackid,
+      'trackname': trackname,
+      'meters': meters,
+      'seconds': seconds
+    };
+  });
+
+  describe('simple tests', () => {
+
+    it('should create uPositionSet instance', () => {
+      // when
+      set = new uPositionSet();
+      // then
+      expect(set.positions).toEqual([]);
+    });
+
+    it('should clear positions data', () => {
+      // given
+      set.positions.push(new uPosition());
+      // when
+      set.clear();
+      // then
+      expect(set.positions).toEqual([]);
+    });
+
+    it('should return positions length', () => {
+      // given
+      set.positions.push(new uPosition());
+      // when
+      const length = set.length;
+      // then
+      expect(length).toBe(1);
+    });
+
+    it('should return true when has positions', () => {
+      // given
+      set.positions.push(new uPosition());
+      // when
+      const result = set.hasPositions;
+      // then
+      expect(result).toBe(true);
+    });
+
+    it('should return false when does not have positions', () => {
+      // given
+      set.positions.length = 0;
+      // when
+      const result = set.hasPositions;
+      // then
+      expect(result).toBe(false);
+    });
+
+    it('should parse json object to track positions', () => {
+      // when
+      set.fromJson([ jsonPosition ]);
+      // then
+      expect(set.length).toBe(1);
+      const position = set.positions[0];
+
+      expect(position.id).toBe(posId);
+      expect(position.latitude).toBe(latitude);
+      expect(position.longitude).toBe(longitude);
+      expect(position.speed).toBe(speed);
+      expect(position.bearing).toBe(bearing);
+      expect(position.timestamp).toBe(timestamp);
+      expect(position.accuracy).toBe(accuracy);
+      expect(position.provider).toBe(provider);
+      expect(position.comment).toBe(comment);
+      expect(position.image).toBe(image);
+      expect(position.username).toBe(username);
+      expect(position.trackid).toBe(trackid);
+      expect(position.trackname).toBe(trackname);
+      expect(position.meters).toBe(meters);
+      expect(position.seconds).toBe(seconds);
+    });
+
+    it('should replace track positions with new ones', () => {
+      const position1 = { ...jsonPosition };
+      position1.id = 100;
+      set.fromJson([ position1 ]);
+      // when
+      set.fromJson([ jsonPosition ]);
+      // then
+      expect(set.length).toBe(1);
+      const position2 = set.positions[0];
+
+      expect(position2.id).toBe(posId);
+    });
+
+    it('should append track positions with new ones', () => {
+      const position1 = { ...jsonPosition };
+      position1.id = 100;
+      set.fromJson([ position1 ]);
+      // when
+      set.fromJson([ jsonPosition ], true);
+      // then
+      expect(set.length).toBe(2);
+      expect(set.positions[0].id).toBe(position1.id);
+      expect(set.positions[1].id).toBe(jsonPosition.id);
+    });
+
+  });
+
+  describe('ajax tests', () => {
+
+    beforeEach(() => {
+      spyOn(XMLHttpRequest.prototype, 'open').and.callThrough();
+      spyOn(XMLHttpRequest.prototype, 'setRequestHeader').and.callThrough();
+      spyOn(XMLHttpRequest.prototype, 'send');
+      spyOnProperty(XMLHttpRequest.prototype, 'readyState').and.returnValue(XMLHttpRequest.DONE);
+      spyOnProperty(XMLHttpRequest.prototype, 'status').and.returnValue(200);
+    });
+
+    it('should make successful request and return latest position for each user', (done) => {
+      // given
+      spyOnProperty(XMLHttpRequest.prototype, 'responseText').and.returnValue(JSON.stringify([ jsonPosition ]));
+      // when
+      uPositionSet.fetchLatest()
+        .then((result) => {
+          expect(XMLHttpRequest.prototype.open).toHaveBeenCalledWith('GET', 'utils/getpositions.php?last=true', true);
+          expect(result).toBeInstanceOf(uPositionSet);
+          expect(result.length).toBe(1);
+          done();
+        })
+        .catch((e) => done.fail(`reject callback called (${e})`));
+    });
+
+
+    it('should call getpositions with params', (done) => {
+      // given
+      const params = { param: 'test' };
+      spyOnProperty(XMLHttpRequest.prototype, 'responseText').and.returnValue(JSON.stringify([ jsonPosition ]));
+      // when
+      uPositionSet.fetch(params)
+        .then(() => {
+          expect(XMLHttpRequest.prototype.open).toHaveBeenCalledWith('GET', 'utils/getpositions.php?param=test', true);
+          done();
+        })
+        .catch((e) => done.fail(`reject callback called (${e})`));
+    });
+
+  });
+
+});